Cooling device for liquids



Dec. l2, 1939. E. w. KRUG COOLLNGk DEVICE FOR LIQUIDS Filed Aug. 25, 1938 v 3 Shee'bS-She-e'l', 1

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INVENTOR. 2M M /w BY @f/ATT RNEY Dec. l2, 1939. E w, KRUG v 2,183,221

COOLING DEVICE FOR LIQUIDS k Filed Aug. 25, 19158 5 Sheets-Sheet 2 INVEN TOR. 5M/z W. f//Pa Dec. 12, 1939. E. w. KR'U'G 2,183,221y

COOLING DEVICE FOR LIQUIDS 50 INVENToR. Z4/z W /Aw BY am* WA W5 Patented Dec. 12, 1939 COOLING DEVICE Foa tramos" f .Application August 25,

v11- Claims.

f This invention relatesto a device forcooling liquids and is particularly directed to a milk cooling device. v

In cooling easilycontaminatedliquids whose v: temperature must be quicklyreducedas in fresh milk, to prevent the rapid growth of bacteria, the practice has usually been tofprovide some cooling means that is inserted into the milk or to allow themilk to run through a cooling member or over ak cooling member. In following thesemethods the milk is often exposed to the air and it becomes difiicultto prevent-the milk from picking up extraneous',contamination, and

ing member or aA cooling; surface, rigid requirements` for sterilizing and cleaning ysuch member or surface have to lbe imposed. As there is no adequate vway inwhich this sanitary requirement ner and objects of this invention are to provide a novel form of cooling device, particularly `for milk, which is so made that the standard. container, for instance the usualtype of milk can, does not have to be opened, in which no outside or auxiliary `cooling member has to be inserted into the milk, but in. which a closed milk can or liquid container is usedand in which the milk or other liquid 'iscaused to circulate Within the milk can so thatallportions repeatedly contact with the innerside walls of they can, and Ainwhich cooling wateren-the outside of the can is kept in constant circulation-about'-the outside walls of the can, allof theseffunctions being obtained in a simple mannerand requiring an inexpensive equipment. v In greater detail,y further objects are toprovide a milk cooling `device in which a tank yfor the cold wateris provided, in which means vare provided for rocking one or more milk Ycans-while partly submerged in the coolingwater, and in which a peculiar motion is imparted to the milk `cans sothat the milk not only, rocks backand forthvin the can but also rotates or circulates within the can causing all portions thereof to repeatedly contact withthe ,chilledy walls, vand in which the peculiar motion of the can causes asteady circulation of the cooling water-.about the can.

Further objects are to provide a milk cooling device which can bequickly detachablyattached v to a tank for the `cooling water, which has a in all cases where. the milkcontacts with a cool- 1938,'sorioi No. k226,623

rocking support for the milk canfthat. is provided with quickly applied and released means for locking a .standard milk can to the support, and in which power means .areprovided for both rocking the support and for giving it a twisting .or turning .motion .back and forthabotan approximately vertical axis, the device forming a unitary,v readily removable structure .sothat it may be placed within or Vremoved fromrthe tank with the yutmost ease.

An embodiment of the yinvention isshown .in the accompanying drawings, in. which:

Figure `1 isv a longitudinal sectional lview through the .device with parts broken .away and in section.

Figure 2 is a transverse sectional viewy on (the line 2-2 of Figurel.

- Figure 3 is a fragmentary Asectional viewoon` the line 3 3 of- Figure 2 with thecan removed. Figure 4 is.a detail sectional view rtaken on the lined-4 of Figure 3. f Figure 5 vshows a further form oi theY invention with parts broken away and in section.

r Figure' is a sectional View on the lineE-i of Figure 5 withthe tank omitted..

Figure 7 is a sectional viewron the line i-l of Figure 5 with the springs` and tank omitted.

Figure 8 is a side elevation of the bottom part of a further vform `of the apparatus with parts omitted.

Referring to the drawings,r it will be seen that i the "device `comprises a base portion, which includes one lor more arms or projecting portions I, which is provided with a socket .bearing 2 and with a runway or guide surface 3 prefercooling tank. vItis -to be noted that ,the 'device maybe made either singleY or for .multiple-units, asy desired.

It is Ato be distinctly understood that the framework or body portion ofthe device including the base may beV changed as-desired.l .lt vis preferable, however, to make the device very :simply and in an reconomical manner. It should pref` erably be, as indicated, oletachably attached .to

the cooling tank I2 so that it may be lifted out when desired.

As many units as needed may be employed. In the form shown, two units have been indicated, though the device may be a single unit device or may be for two, three or any number.

All of the container holding devices are similar and a description of one will be suiflcient, The container holding device is shown in plan in Figure 3 and it will be seen that it comprises a supporting base I3 which is provided with aflange I4 adapted to receive the liquid container, for example in the particular form chosen for illustration the milk can I5 provided with the handles I6 and with a tightly fitting closed top as is the customary practice.

These milk cans are seated on the base I3 within the flange I4 and are thus retained in place at their lower portion. In order to detachably clamp the milk cansy to the base, spring clamping members are provided which may take the form of a metal strap member I7 secured on opposite sides of the container support I3 and having outwardly turned upper ends I8. A strap member I9 is slidably associated with the strap member I'I and is provided with a lower outwardly turned angular portion 20. Between the portions I8 and 20 an expansion spring 2l is positioned so that the strap member I9 is rigidly held downwardly by the spring. The strap member I9 has rigidly secured thereto a hook like portion 22 which hooks over the handle I6 of the milk can. Preferably the strap member I9 is provided with an outwardly turned hand grip 23 so that it may be readily pulled up in attaching or detaching the can.

Each of the base members is provided with a downwardly projecting bearing lug 24 which has a rounded bottom seated within the socket 2. The base members are each provided with an outwardly projecting arm 25 which carries a roller 26 adapted to ride on the bearing surface or guide surface 3, as shown in Figures 2, 3 and 4 so that there is a limited rocking motion about the axis of the supporting lugV 24 whose purpose will hereinafter appear.

A rock arm 2'I extends upwardly from the base and may be made in the form of an invertedV, as shown in Figure 1, to secure the necessary rigidity. These rock arms 2 are joined by a connecting link 28 so that they will oscillate back and forth in unison. l The left-hand rock arm 2 as viewed in Figure 1 is operatively connected to the crank pin 29 of a pulley 3l) by means of the connecting rod 3|. The pulley 3E is connected by a belt 32, cr in any other suitable way, with a small pulley 33 on the shaft of the motor 9.

In using the device, the milk cans are filled with fresh warm milk and their tops securely positioned. Thereafter the tops are not again removed and consequently the milk cannot become contaminated from outside sources, such as the air or by contacting any portion of the apparatus.

The milk cans are immediatelyfplaced on their supports I3, the cooling tank I2 being filled with cold water to about the line indicated by the reference character 34. The operator lifts the hooks 22 upwardly by grasping the hand grips 23 and positions the hooks 22 over the handles I6 of the milk cans I5. The motor is then started and the milk cans are rocked back and forth about their projecting pivots or pivot bearings 24 which are seated within the socket bearings 2. However, it is to be noted that the rock arm 2'I for each container support is offset with reference to the pivot bearing and also the pivot bearing is offset with reference to the center of gravity of the filled milk cans. It will be seen, therefore, that as the rock arms 2I are oscillated back and forth, that there is also a limited rotary motion imparted to the supports I3 and consequently to the milk cans I5, as the roller 26 rides back and forth along the guide or supporting surface 3.

It has been found that the milk within the milk cans not only rocks back and forth but also gets a rotary motion and `all portions of the milk are brought into contact with the interior chilled walls oi the milk can.

Another peculiar effect has been noted, nainely, that as the milk cans are rocked back and forth and given this limited rotary motion first in one .direction for one rocking motion and then in the other direction for the other rocking mo-V tion, that the water also circulates in the cooling tank I2. It has a slow travel around the cooling tank and thus any water that becomes slightly warm after contact with the surface ci the can is immediately swept away and fresh cool water is caused to contact with the can. If desired, an overflow and a constant supply of fresh water, neither of which has been shown, could be furnished in the usual manner.

It will be seen that a very pronounced advantage that this device has is that the milk is immediately cooled without being exposed to the outside air and without contacting with any other portion of the apparatus than the interior walls of the milk can where it is to be kept. There is, therefore, no chance of outside contamination and additionally there is a very rapid cooling of the milk due both to the rotary and oscillatory motion of the milk and the repeated contact of all portions of the milk with the inner chilled walls of the can andy also due to the fact' that the Water within the tank is continually circulated'due to the operation of the apparatus.

Referring to Figures 5, 6 and 7, it will be seen that the device' comprises a base 35 which supports a frame 36, the frame carrying at its upper end a support 3'I for the motor 38. The motor .drives the crank shaft 39' in any suitable manner as by means of the pulleys 40 and 4I joined by the belt 42, although any other suitable means of reduction may be employed. 'I'he crank 43 is connected by means of the connecting rod 44 with one arm ofla bell crank lever 45 which is pivotally mounted at 46. The bell crank lever is provided with a lower arm 47 which is slotted and which loosely receives the lever or arm 48. Preferably pins 49 are carried by the arm 48 Vand are located on opposite sides of the downwardly extending arm 4'I of the bell crank lever 45.

The lever or arm 48 is rigidly attached to a bracket 5D rigid with the rocking milk can support 5I, such support being provided with a downwardly extending rounded projecting member 52 socketed in the base 35. Preferably the milk can support 5I is provided with a plurality of positioning lugs 53 around its periphery for positioning the milk can and if desired a U- shaped strap 54 may be connected with the support 5I by means of springs 55, such strap 54 being positioned over the top of the milk can and holding it securely in position, the milk can being indicated in dotted lines inFigures 5 and 6.

portion adapted to be placed within a tank for cooling water,` said base portion having a supporting bearing and having a runway portion spaced from said supporting bearing, a container supporting member supported from said bearing and having a projectingarm 'supported from said runway portionja rock arm located 01T center with respect to saidsupporting bearing and rigid with said container supporting member and projecting outwardly therefrom, and power means for oscillating said rock arm.

.7. A liquid cooling device comprising a base portion adapted to beplaced-within a tank for cooling water, said vbase portion having a supporting bearing and having a runway portion spacedfrom saidsupporting bearing, a container supporting member supported from said bearing portion adapted to be placed Within a tank for cooling water, saidrba'se portion having a supporting'bearing and having a' runwayportion spaced from said supporting bearing, a container supporting member supported from said bearing and having a projectingarm provided with a roller supported from said runway portion, a :rock arm'l'ocated off center with respect to said supporting bearing and rigid with said container supporting member and projecting outwardly therefrom, and

power means for oscillating said rock arm. l

' 9. Aliquidf cooling device' comprising a tank for cooling water, a socket bearing located within said tank, a container supporting member pivoted on said socket bearing for rocking motion and foroscillatory motion about different axes, a rock arm rigidly secured to said container supporting member, .and a power driven member operatively connected to the outer end of said rock arm, said member imparting both lateral .and vertical motion to the outer end -vof said rock arm. A

410. A liquid cooling device comprising a tank for cooling water, a socket bearing located within said tank, a containersupporting member pivoted on'said socket bearing for rocking motion and for oscillatory motion about diiierent axes, a rock arm rigidly secured to said container supporting member, and a power driven member operatively connected to the outer end of said rock arm, said member 'imparting both lateral and vertical motion to the outer endof said rock arm, said .bearing support being placed 01T center with reference to said container supporting member. f11;A `liquid cooling device comprising a tank forcooling water, a bearing located within said tank, a container supporting member pivoted on said bearingfor rocking motion and for oscillatory motion about dilierent axes, a rock arm rigidly secured t o said container supporting member and having a projecting end, a lever pivotally mounted adjacent said end of said rock arm and operatively connected to said end of said rock arm,l'said lever causing said end of said rock arm tomove laterally and vertically, whereby rocking and oscillatorymotion is imparted to said container supporting member, and power means for rocking said lever.y

' EMIL W. KRUG.` A 

